Typewriting and similar machine



l, 1936- L. ROHRER I 2,037,178

TYPEWRITING AND SIMILAR MACHINE Filed Nov. 22, 1954 a S3 A? /7 Loren 5Fichrer |NVEMTO@ EW Patented Apr. 14, 1936' PATENT. OFFICE TYPEWRITINGAND SIMILAR MACHINE Lorenz Rohrer, Munich,

Germany, assignor to Paul Emil Schoeni'elder, Munich, GermanyApplication November 22, 1934, Serial No. 754,227 In Germany December15, 1933 1 Claim. (01. 197-82) The invention relates to an improvementin typewriting and similar machines and more particularly to theadjusting oi the paper-carriage to any desired position within the line.The device provided for this purpose may easily be mounted on anymachine without any furthe auxiliary means being required.

The device consists substantially of a lever mounted on the typewriterand operated by the typist, the lever being elastically connected withthe release-body, for instance by means of a spring-device in such amanner that by moving the lever into the operating position thereleaseaction is effected and repeats itself automatically withoutinterruption, until the lever returns to the stationary position. Thisdoes not cause the paper-carriage to run loose in the direction of thetraction-spring of the carriage, whilst the lock is disengaged, but thepaper-carriage pergo forms an uninterrupted, automatic, and progressiveadvance with continuous motion olthe release-body.

The key-lever is advantageously arranged with respect to theletter-plate in such a manner that 95 when operating it, the typist doesnot need to take his hand oil the letter-plate.

- Fig. 1 of the attached drawing illustrates a side-view of the device.Fig. 2 is a birds-eye view of the release-pawls.

30 The key-lever I which may be provided at any suitable place on thetypewrlting machine and which carries at the one end the key 2, isrotatably mounted on shaft 3, and connected at the other end with abell-crank lever 5 by means of 35' a rod 4. The lever 5 is rotatablearound pivot 8 and is connected with the pawl 8 by means of a spiralspring I. Said pawl 8 is rotatable on a joumal 9 fastened to thereleasemember III. The release member I8 is rotatable around the m shaft II.The pawl 8 cooperates with the teeth H or the escapement-wheel l3. Saidescape ment-wheel I3 is arranged to rotate with nave l4 around thejournals l5, l6.

Fig. 2 shows the positioning of any tooth i2 45 of the escapement-wheelwith respect to the pawl 8 and the wedge-shaped pawl ll in thebrakeposition of the escapement-wheel i3.

The operation of the device is as follows:

By pressing down the key-lever i, the bellcrank lever 5 is swung out andby means of spring 1 it carries the pawls 8 and III with it. The pawl 8releases the blocked tooth I 2 of the escapement wheel, and the tooth l2strikes the pawl ll. By the action of traction-springs 01' the pa.- 5per-carriage (not shown) the pawls 8 and ID are moved back into theposition of rest by means of the wedge-shaped surface of pawl l1. Owingto the tension of the spring I the releasing process is repeatedautomatically and without inter- 10 ruption, as long as the key-lever Iis kept pressed down. The paper-carriage may thus be moved into anydesired position, either by pressing down the key-lever l or byreleasing it. The influence of the carriage-traction-spring onthe-release- 15 mechanism is greater than the tension-strength of thespring connecting the key-lever with the release-mechanism.

The applications of the device are maniiold. For instance with printedforms any spaces which otherwise require a repeated use of the spacekey,may be jumped over by a single pressure on the key-lever, that is to sayby one single pressure on the key the paper-can'iage may be made to runto any desired place of the line and likewise stopped atany desiredplace. Also entire lines or any desired parts of it may be underlinedquickly and without trouble by pressure on the key-lever and operationoi the underlining key. The device may for instance also be used forparagraphing and other like purposes.

What I claim is:

In a typewriting machine, a release device comprising a first pawl and asecond pawl con-.

nected therewith, a toothed escapement-wheel cooperating with saidpawls, a movable paper carriage associated with said escapement-wheel, acentrally pivoted lever carrying a key at one end, a pivoted bell-cranklever having one arm conuected to the other end of said lever, a springconnecting the other arm of said bell-crank lever with one of saidpawls, one of said pawls having a wedge-shaped surface adapted duringoperation of the device to be'successively engaged by the teeth of thesaid escapement-wheel thereby 45 tending to restore the pawls to theirnormal position.

